A magnesium anode is used as a sacrificial anode in cathodic protection. Magnesium has the highest driving voltage of all the materials used for sacrificial anodes. Magnesium is low on the noble scale, and therefore corrodes easily. Therefore, if it is placed within a system that uses large amounts water, it attracts the corrosion away from other components.
Magnesium anodes can be customised to fit almost any requirement in terms of shape, size, chemical composition, etc.
The average current capacity of magnesium anode is 1 210 A.h/kg. The average closed circuit potential is -1 570~-1 520 mV versus Cu/CuSO4 seawater.
Magnesium anode meets CCS requirements.
The magnesium anodes can be provided in accordance with GB∕T 17731-2015. Other standards can be met upon request.
Magnesium anodes are commonly used sacrificial anodes that keep many types of industrial equipment corrosion-free. They are used in:
Buried Pipelines
Onshore Platforms
Steel Structures
Distribution Systems
Above-ground Tanks
Underground Tanks
Huge Boilers
| Capacity | 1 210A.h/kg |
| Efficiency | 0.55 |
| Specific Gravity | 1 738kg/m³ |
| Closed Circuit Potential | -1 520~-1 570mV vs Cu/CuSO4/seawater |
| Material | %,by weight |
| Aluminium（Al） | 5.0~7.0 |
| Zinc（Zn） | 2.0~4.0 |
| Nickel (Ni) | 0.003 |
| Copper（Cu） | ≤0.1 |
| Iron（Fe） | ≤0.003 |
| Silicon（Si） | ≤0.30 |
| Mangan（Mn） | 0.15~0.70 |
| Magnesium (Mg) | Reminder |
| Material | %,by weight |
| Powdered Gypsum | 75 |
| Granular Bentonite | 20 |
| Sodium Sulphate | 5 |
Magnesium Anodes are very electronegative, therefore they are increasingly able to supply electrons to the more electropositive steel when in electrical contact in water, resulting in cathodic protection of the steel surface. They have very high efficiency and the highest available driving potential, which is an advantage in higher resistivity soils. Magnesium Anodes can be used for both underground and under water applications but work best in fresh water.
